Thanks guys,
CAP 437 is usefull.
It specifies 200 kg per square meter loading.
That will be a good starting point for our more detailed structural calculations.
load spreading and impact padding were already considered.
The 2G impact sound theory is very interesting but hardly relevant
If we are not allowed to discuss safety (engineering or otherwise, all seem equally relevant to me) , this will be a very quiet forum.
If you are in the neighbourhood you are welcome to visit the rig to see how we address safety. Please pm me upfront.
SLB